Add a basic example in the readme file

yarn add @fawmi/vue-google-maps

```

## Example

Here is a basic example 

```

import { createApp } from 'vue'

import googleMap from '@fawmi/vue-google-maps'

import App from './App.vue';

const googleMapOption = {

    apiKey: 'here_comes_your_api_key',

}

const app = createApp(App);

app.use(googleMap, googleMapOption)

app.mount('#app')

```

You can also install via Yarn

```

yarn add @fawmi/vue-google-maps

```

## Documentation

A detailed documentation with examples can be found at https://vue-map.netlify.app/

Checkout [https://vue-map.netlify.app](https://vue-map.netlify.app/) for a detailed documentation